diff --git a/.forgejo/workflows/ci.yml b/.forgejo/workflows/ci.yml
new file mode 100644
index 0000000..edb5478
--- /dev/null
+++ b/.forgejo/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install build tools
+        run: sudo apt-get update && sudo apt-get install -y gcc make python3
+      - name: Build
+        run: make
+      - name: Run tests
+        run: ./claro test
+      - name: Check lessons
+        run: |
+          ./claro check lessons/01_hello.claro
+          ./claro check lessons/03_variables.claro
+          ./claro check lessons/08_functions.claro
+      - name: Validate RC3
+        run: python3 tools/validate_rc3.py